I don't surf anymore, probably at least 20 years ago. But shark attacks on humans are rare. Humans just aren't normally what sharks consider "food".
Surfing in So. Cal, usually requires at least a short wet suit, due to the cold water. Farther north, a long one usually works.
Problem is, when your arms and legs are dangling over the side of the board, and from an under water, you really look like a seal. Considered a very "tasty" treat for a shark. Most hit's on surfer's is a case of mistaken identity, shark think's "yummmmmy, fresh seal....me hungry", surfer get's whacked. Rarely is a surfer actually eaten by the sharks, after said shark discover's surfer isn't really all that tasty, and generally not on the local fare. Deaths occur from the amount of damage incurred by the shark.
Having said that, I've seen a few sharks, especially surfing off the coast of Mexico, and it will definetly cause certain human orifices to "pucker".
Bull sharks are a little more scary. They are very curious, will, "explore" with their teeth, and I belive are the cause of most death's by shark attack.
One really scary fact about bull sharks, is that their liver is unique, in that they can easily adapt to fresh water. Sharks have been found in brackish, and fresh water, and have actually been caught in waters as far north as Illinois. Nobody seems to be in agreement as to why this is happening, but it's very common in African rivers to find bull's 3 or 400 miles north in freshwater rivers.
Hope my local trout stream isn't deep enough for a migration....
Just some shark 'lore from a since "retired" over-the-hill surfer..
J.
